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采用扫描电镜即时记录了裂纹尖端的微裂纹发育和演化过程， 并应用双扭试件测试了三峡船闸花岗岩的亚临界裂纹扩展。推导出压应力状态下， 考虑亚临界裂纹扩展时， 裂纹流变断裂扩展的计算公式； 考虑了裂纹之间的相互作用。运用损伤力学中的平均场模量的概念， 将流变裂纹扩展推广到多裂隙岩体中去， 建立裂隙岩体损伤流变断裂扩展的力学模型。根据此模型， 采用有限元方法进行了三峡船闸高边坡损伤流变断裂分析， 并与实测值做了比较。
The development and evolution of microcracks at crack tip were recorded by scanning electron microscope (SEM), and the subcritical crack propagation of the Three Gorges shiplock granite was tested by double torsion test. The calculation formula of rheological fracture propagation under the condition of compressive stress is deduced considering the subcritical crack propagation. The interaction between the cracks is considered. Using the concept of average field modulus in damage mechanics, the rheological crack propagation is extended to multi-fractured rock mass, and a mechanical model of rheological fracture propagation in the damaged rock mass is established. According to this model, the rheological fracture analysis of the high slope of the Three Gorges ship lock using the finite element method is carried out and compared with the measured values.